1. Associação Euratom/IST, Centro de Fusão Nuclear, Instituto Superior Técnico, 1049-001 Lisboa, Portugal
2. Associación Euratom/Ciemat, 28040 Madrid, Spain
3. Euratom/UKAEA Association, Culham Science Centre, Abingdon Oxon OX14 3DB, United Kingdom
4. Centre de Recherches en Physique des Plasmas, Association Euratom-Confédération Suisse, École Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland